diff options
Diffstat (limited to 'vm/mterp/armv6t2/OP_FLOAT_TO_LONG.S')
| -rw-r--r-- | vm/mterp/armv6t2/OP_FLOAT_TO_LONG.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/vm/mterp/armv6t2/OP_FLOAT_TO_LONG.S b/vm/mterp/armv6t2/OP_FLOAT_TO_LONG.S new file mode 100644 index 0000000..168e338 --- /dev/null +++ b/vm/mterp/armv6t2/OP_FLOAT_TO_LONG.S @@ -0,0 +1,40 @@ +%verify "executed" +@include "armv6t2/unopWider.S" {"instr":"bl __aeabi_f2lz"} +%include "armv6t2/unopWider.S" {"instr":"bl f2l_doconv"} + +%break +/* + * Convert the float in r0 to a long in r0/r1. + * + * We have to clip values to long min/max per the specification. The + * expected common case is a "reasonable" value that converts directly + * to modest integer. The EABI convert function isn't doing this for us. + */ +f2l_doconv: + stmfd sp!, {r4, lr} + mov r1, #0x5f000000 @ (float)maxlong + mov r4, r0 + bl __aeabi_fcmpge @ is arg >= maxlong? + cmp r0, #0 @ nonzero == yes + mvnne r0, #0 @ return maxlong (7fffffff) + mvnne r1, #0x80000000 + ldmnefd sp!, {r4, pc} + + mov r0, r4 @ recover arg + mov r1, #0xdf000000 @ (float)minlong + bl __aeabi_fcmple @ is arg <= minlong? + cmp r0, #0 @ nonzero == yes + movne r0, #0 @ return minlong (80000000) + movne r1, #0x80000000 + ldmnefd sp!, {r4, pc} + + mov r0, r4 @ recover arg + mov r1, r4 + bl __aeabi_fcmpeq @ is arg == self? + cmp r0, #0 @ zero == no + moveq r1, #0 @ return zero for NaN + ldmeqfd sp!, {r4, pc} + + mov r0, r4 @ recover arg + bl __aeabi_f2lz @ convert float to long + ldmfd sp!, {r4, pc} |